Answer:
x = 3.25
y =4.75
Step-by-step explanation:
In order to Solve the following system of equations below algebraically using substitution method we say that;
let;
8x - 4y = 7
..................... equation 1
x + y = 8.......................... equation 2
from equation2
x + y = 8.......................... equation 2
x = 8 - y.............................. equation 3
substitute for x in equation 1
8x - 4y = 7
..................... equation 1
8(8-y) - 4y = 7
64-8y-4y=7
64-12y=7
collect the like terms
64-7 = 12y
57= 12y
divide both sides by the coefficient of y which is 12
57/12 = 12y/12
4.75 = y
y =4.75
put y = 4.75 in equation 3
x = 8 - y.............................. equation 3
x = 8 -4.75
x = 3.25
to check if your answer is correct, put the value of x and y in either equation 1 or 2
from equation 2
x + y = 8.......................... equation 2
3.25 + 4.75 =8
8=8.................... proved
Let's solve your inequality step-by-step.
5x<30
Step 1: Divide both sides by 5.
5x
5
<
30
5
x<6
<span>-28x²-12x = -4x(7x+3) the first one is answer</span>
Answer:
so the final answer is =17
Step-by-step explanation:
9+12/3=13+4/2=2+1*2=2 the answer is 13+2+2=17
Answer:
28.8
Step-by-step explanation:
A squared plus b squared equals c squared.
